The Largemouth Bass (Micropterus salmoides) is a popular sport fish, renowned for its size and fighting spirit. These fish can reach lengths of up to 24 inches and weigh over 20 pounds.... The Largemouth Bass (Micropterus salmoides) is a popular sport fish, renowned for its size and fighting spirit. These fish can reach lengths of up to 24 inches and weigh over 20 pounds. They have a large mouth that extends beyond their eyes and a robust, greenish body with a dark horizontal stripe. Largemouth Bass are aggressive predators, feeding on fish, crustaceans, frogs, and even small birds.Click here to read more about Largemouth Bass.